/*
* Copyright (c) 1994, 1995, 1996, 1997
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
/*
* Copyright (c) 1997 Yen Yen Lim and North Dakota State University
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Yen Yen Lim and
North Dakota State University
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/* Based on UNI3.1 standard by ATM Forum */
/* ATM traffic types based on VPI=0 and (the following VCI */
#define VCI_PPC 0x05 /* Point-to-point signal msg */
#define VCI_BCC 0x02 /* Broadcast signal msg */
#define VCI_OAMF4SC 0x03 /* Segment OAM F4 flow cell */
#define VCI_OAMF4EC 0x04 /* End-to-end OAM F4 flow cell */
#define VCI_METAC 0x01 /* Meta signal msg */
#define VCI_ILMIC 0x10 /* ILMI msg */
/* Information Element Parameters in the signalling messages */
#define CAUSE 0x08 /* cause */
#define ENDPT_REF 0x54 /* endpoint reference */
#define AAL_PARA 0x58 /* ATM adaptation layer parameters */
#define TRAFF_DESCRIP 0x59 /* atm traffic descriptors */
#define CONNECT_ID 0x5a /* connection identifier */
#define QOS_PARA 0x5c /* quality of service parameters */
#define B_HIGHER 0x5d /* broadband higher layer information */
#define B_BEARER 0x5e /* broadband bearer capability */
#define B_LOWER 0x5f /* broadband lower information */
#define CALLING_PARTY 0x6c /* calling party number */
#define CALLED_PARTY 0x70 /* called party number */
#define Q2931 0x09
/* Q.2931 signalling general messages format */
#define PROTO_POS 0 /* offset of protocol discriminator */
#define CALL_REF_POS 2 /* offset of call reference value */
#define MSG_TYPE_POS 5 /* offset of message type */
#if 0
#define MSG_LEN_POS 7 /* offset of message length */
#define IE_BEGIN_POS 9 /* offset of first information element */
/* format of signalling messages */
#define TYPE_POS 0
#define LEN_POS 2
#define FIELD_BEGIN_POS 4
#endif
/* end of the original atmuni31.h */
#define OAM_CRC10_MASK 0x3ff
#define OAM_PAYLOAD_LEN 48
#define OAM_FUNCTION_SPECIFIC_LEN 45 /* this excludes crc10 and cell-type/function-type */
#define OAM_CELLTYPE_FUNCTYPE_LEN 1
static const struct uint_tokary oam_celltype2tokary[] = {
{ OAM_CELLTYPE_FM, oam_fm_functype_values },
{ OAM_CELLTYPE_PM, oam_pm_functype_values },
{ OAM_CELLTYPE_AD, oam_ad_functype_values },
/* uint2tokary() does not use array termination. */
};
/*
* Print an RFC 1483 LLC-encapsulated ATM frame.
*/
static u_int
atm_llc_print(netdissect_options *ndo,
const u_char *p, int length, int caplen)
{
int llc_hdrlen;
llc_hdrlen = llc_print(ndo, p, length, caplen, NULL, NULL);
if (llc_hdrlen < 0) {
/* packet not known, print raw packet */
if (!ndo->ndo_suppress_default_print)
ND_DEFAULTPRINT(p, caplen);
llc_hdrlen = -llc_hdrlen;
}
return (llc_hdrlen);
}
/*
* Given a SAP value, generate the LLC header value for a UI packet
* with that SAP as the source and destination SAP.
*/
#define LLC_UI_HDR(sap) ((sap)<<16 | (sap<<8) | 0x03)
/*
* This is the top level routine of the printer. 'p' points
* to the LLC/SNAP header of the packet, 'h->ts' is the timestamp,
* 'h->len' is the length of the packet off the wire, and 'h->caplen'
* is the number of bytes actually captured.
*/
void
atm_if_print(netdissect_options *ndo,
const struct pcap_pkthdr *h, const u_char *p)
{
u_int caplen = h->caplen;
u_int length = h->len;
uint32_t llchdr;
u_int hdrlen = 0;
ndo->ndo_protocol = "atm";
/* Cisco Style NLPID ? */
if (GET_U_1(p) == LLC_UI) {
if (ndo->ndo_eflag)
ND_PRINT("CNLPID ");
ndo->ndo_ll_hdr_len += 1;
isoclns_print(ndo, p + 1, length - 1);
return;
}
/*
* Must have at least a DSAP, an SSAP, and the first byte of the
* control field.
*/
/*
* Extract the presumed LLC header into a variable, for quick
* testing.
* Then check for a header that's neither a header for a SNAP
* packet nor an RFC 2684 routed NLPID-formatted PDU nor
* an 802.2-but-no-SNAP IP packet.
*/
llchdr = GET_BE_U_3(p);
if (llchdr != LLC_UI_HDR(LLCSAP_SNAP) &&
llchdr != LLC_UI_HDR(LLCSAP_ISONS) &&
llchdr != LLC_UI_HDR(LLCSAP_IP)) {
/*
* XXX - assume 802.6 MAC header from Fore driver.
*
* Unfortunately, the above list doesn't check for
* all known SAPs, doesn't check for headers where
* the source and destination SAP aren't the same,
* and doesn't check for non-UI frames. It also
* runs the risk of an 802.6 MAC header that happens
* to begin with one of those values being
* incorrectly treated as an 802.2 header.
*
* So is that Fore driver still around? And, if so,
* is it still putting 802.6 MAC headers on ATM
* packets? If so, could it be changed to use a
* new DLT_IEEE802_6 value if we added it?
*/
if (ndo->ndo_eflag)
ND_PRINT("%08x%08x %08x%08x ",
GET_BE_U_4(p),
GET_BE_U_4(p + 4),
GET_BE_U_4(p + 8),
GET_BE_U_4(p + 12));
/* Always cover the full header. */
ND_TCHECK_LEN(p, 20);
p += 20;
length -= 20;
caplen -= 20;
hdrlen += 20;
}
ndo->ndo_ll_hdr_len += hdrlen;
ndo->ndo_ll_hdr_len += atm_llc_print(ndo, p, length, caplen);
}
if (GET_U_1(p + PROTO_POS) == Q2931) {
/*
* protocol:Q.2931 for User to Network Interface
* (UNI 3.1) signalling
*/
ND_PRINT("Q.2931");
ND_PRINT(":%s ",
tok2str(msgtype2str, "msgtype#%u", GET_U_1(p + MSG_TYPE_POS)));
/*
* The call reference comes before the message type,
* so if we know we have the message type, which we
* do from the caplen test above, we also know we have
* the call reference.
*/
call_ref = GET_BE_U_3(p + CALL_REF_POS);
ND_PRINT("CALL_REF:0x%06x", call_ref);
} else {
/* SSCOP with some unknown protocol atop it */
ND_PRINT("SSCOP, proto %u ", GET_U_1(p + PROTO_POS));
}
}
/*
* Print an ATM PDU (such as an AAL5 PDU).
*/
void
atm_print(netdissect_options *ndo,
u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length,
u_int caplen)
{
ndo->ndo_protocol = "atm";
if (ndo->ndo_eflag)
ND_PRINT("VPI:%u VCI:%u ", vpi, vci);
if (vpi == 0) {
switch (vci) {
case VCI_PPC:
sig_print(ndo, p);
return;
case VCI_BCC:
ND_PRINT("broadcast sig: ");
return;
case VCI_OAMF4SC: /* fall through */
case VCI_OAMF4EC:
oam_print(ndo, p, length, ATM_OAM_HEC);
return;
case VCI_METAC:
ND_PRINT("meta: ");
return;
case VCI_ILMIC:
ND_PRINT("ilmi: ");
snmp_print(ndo, p, length);
return;
}
}
switch (traftype) {
case ATM_LLC:
default:
/*
* Assumes traffic is LLC if unknown.
*/
atm_llc_print(ndo, p, length, caplen);
break;
case ATM_LANE:
lane_print(ndo, p, length, caplen);
break;
}
}